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  2. Pyrrole - Wikipedia

    en.wikipedia.org/wiki/Pyrrole

    Pyrrole is an extremely weak base for an amine, with a conjugate acid pK a of −3.8. The most thermodynamically stable pyrrolium cation (C 4 H 6 N +) is formed by protonation at the 2 position. Substitution of pyrrole with alkyl substituents provides a more basic molecule—for example, tetramethylpyrrole has a conjugate acid pK a of +3.7.

  3. Pyrrolidine - Wikipedia

    en.wikipedia.org/wiki/Pyrrolidine

    Pyrrolidine, also known as tetrahydropyrrole, is an organic compound with the molecular formula (CH 2) 4 NH. It is a cyclic secondary amine , also classified as a saturated heterocycle . It is a colourless liquid that is miscible with water and most organic solvents.

  4. Heterocyclic amine - Wikipedia

    en.wikipedia.org/wiki/Heterocyclic_amine

    Nicotine is a molecule containing a pyrrolidine ring attached to a ring of pyridine (other heterocyclic amine). Nicotine belongs to a group of compounds known as alkaloids, which are naturally occurring organic compounds with nitrogen in them. Pyrrole is another compound made up of molecules with a five-membered heterocyclic ring. These ...

  5. Pyrroline - Wikipedia

    en.wikipedia.org/wiki/Pyrroline

    Pyrrolines, also known under the name dihydropyrroles, are three different heterocyclic organic chemical compounds that differ in the position of the double bond.Pyrrolines are formally derived from the aromate pyrrole by hydrogenation. 1-Pyrroline is a cyclic imine, whereas 2-pyrroline and 3-pyrroline are cyclic amines.

  6. Pyrrolizidine alkaloid - Wikipedia

    en.wikipedia.org/wiki/Pyrrolizidine_alkaloid

    PAs are metabolized in the liver through CYP450-mediated pathways. This metabolic process leads to the formation of reactive intermediates, such as pyrrolic metabolites, which can covalently bind to proteins in the liver, forming pyrrole-protein adducts. These adducts impair the function of essential liver proteins, leading to hepatotoxicity.

  7. Proline - Wikipedia

    en.wikipedia.org/wiki/Proline

    From a kinetic standpoint, cis–trans proline isomerization is a very slow process that can impede the progress of protein folding by trapping one or more proline residues crucial for folding in the non-native isomer, especially when the native protein requires the cis isomer.

  8. The Surprising High-Protein, Low-Carb Foods to Should ... - AOL

    www.aol.com/best-high-protein-low-carb-181600799...

    Nutrition facts (3 oz., canned in water): 110 cal, 2.5g total fat, 35mg cholesterol 320mg sodium, 0g carb, 0g fiber, 20g protein RELATED: 10 Healthy Fish to Eat If You Want to Crush Your Weight ...

  9. Pyrrolysine - Wikipedia

    en.wikipedia.org/wiki/Pyrrolysine

    More recent data favor direct charging of pyrrolysine on to the tRNA(CUA) by the protein product of the pylS gene, leading to the suggestion that the LysRS1:LysRS2 complex may participate in a parallel pathway designed to ensure that proteins containing the UAG codon can be fully translated using lysine as a substitute amino acid in the event ...